Apparatus for removing scale from boiler-tubes.



No. 860,030. PATENTED JULY 16, 1907.

D. J. JENKINS,

APPARATUS FOR REMOVING SCALE PRDM BOILER TUBES. APPLICATION r xLEn1120.21, 1906.

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PATENTBD 'JULY 10, 1907.

1). J. JENKINS. 0 v APPARATUS FOR REMOVING SCALE FROM BOILER TUBES.

APPLIUA TION TILED Bil-10.21.1906.

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PATENT orrron.

DAVID J. JENKINS, OF CARDIFF, ENGLAND.

APPARATUS FOR REMOVING- SCALE FROM BO ILER-TUBES.

Specification of Letters Patent.

Patented July 16, 1907.

Application filed December 21, 1906. S ri l 1111- 348,845.

To all whom 'it may concern: Be it known that I, DAVID J. .TnNKINs, asubject of the King of Great Britain, residing in Cardiff, Glamorgan,Wales, England, have invented a new and Improved Apparatus for RemovingScale from Boiler- Tubes, of which the following is a specification.

a rear view with the handles and the clamps removed- Fig. 4 is anenlarged end view showing it in operation, a portion of the boiler-tubesbeing illustrated. Fig. 5 is a vertical section taken through one of thecleaners and the back-plates. Fig. 6 is a front view of one of theholding clamps detached.

a and I) represent respectively upper and lower horizontal bars, madepreferably of metal, which are formed respectively on their lower andupper surfaces into arc-shaped portions 0 and d, all of which areprovided with teeth 0 which project forward and slightly inward, as theyare substantially of the shape and arrangement of saw-teeth. Each of theupper portions 0 constitutes a complete one-half circle, and the same istrue of each of the lower portions d, whereby each pair 0 and dconstitute when the partsare in position a complete circulartube-cleaner with a complete circular row of teeth. At the rear of theupper and lower bars a and b are upper and lower back-plates f and g,which act as supporting plates or strengthening plates, and between theback-plates at the opposite ends of the device are blocks h, said blocksand upper and lower back-plates being rigidly secured together by pairsof bolts 70 and nuts k. The opposite ends of the upper bars a extendbehind the opposite ends of the lower bars b, as indicated in Figs. 1, 2and 4, the diagonal lines a in Fig. 1 indicating the ends of the frontsurfaces of said bars a, at which point they are recessed in order toextend behind the bars I), and the dotted lines b in Fig. 1 indicatingthe position of the extreme ends of said bars-a behind the bars I). thebars a and I) therefore are substantially of the shape of parallelplates, and they are held together by bolts 1 having nuts m on theirfront ends, said bolts extending horizontally through the plates a and band the blocks h. These bolts are provided with integral flanges nbetween which and the said nuts the plates a, b and the blocks h areheld. A strengthening pin 0 is screwed downward through the upper bar aand into the lower The opposite ends of.

.- bar b, said bars at that point being broadened between the adjacentcleaners, thus providing a seat on the upper surface of the bar a forthe shoulder or head 0 of said screw. v

The bolts Z are provided at the rear of the flanges n with extensions Vwhich are pivotally connected at p to the lower curved ends 8 ofsubstantially'vertical handles 8. 'Each' of these handles is slotted att, as indicated in Fig. 4, to receive pivotally the shank 11. (Figs. 2,4 and 6) of the upturned jaw u, said shank extending horizontallythrough the central portion 1) of the double jaw 'v-the portion of theshank in the slot and in the double jaw being adjusted by means of thering or washer w and the nut y, and said jaws constituting a clamp forengagement with the tubes as of the boiler.

The two bars a and b with their integral portions 0 and d whichconstitute the cleaners, together with the upper and lower back-plates fand g are applied to a row of boiler-tubes :c, the portions a, c and fbeing above the row of tubes and the portions b, d and g being belowsaid row. The blocks h are bolted in position, and the clamps o, u areapplied to the boiler-tubes by placing the concave surfaces of thejaws 1) against one sur-' face of two vertically adjacent boiler-tubesand the jaw behind one of the tubes. After the bolts 70 and l have beenplaced in position the device is exactly as illustrated in Figs. 1, 2and 3 as regards the arrangement of its parts and is in the positionindicated in Fig. 4 with relation to the boiler-tubes. By working thehandles 8 back and forth the cleaners c are moved simultaneously on theboiler-tubes and operate effectually to remove scale and any otherforeign substance therefrom. The cleaners are advanced along the tubesby moving the clamps until all the scale has been scraped off.

As is evident, the adjustment of the cleaners on the tubes is easilyregulatedby the bolts k and nuts 7c, and the adjustmentof the clamps onthe tubes may be regulated by the nuts y.

Having thus fully described my invention, what I claim and desire tosecure by Letters-Patent, is:

1. An apparatus for removing scale from boiler-tubes, comprisingparallel bars each provided with a row of arcshaped portions 0 and (1provided with teeth 6; h0rizontal back-plates parallel with said barscand d; blocks located at the opposite ends of said bars between theback-plates; a centrally located strengthening bolt connecting saidbars; and means for securing said bars, blocks, and back-plates togetherwhereby said arc-shaped portions will be placed opposite each other andeach portion 0 and d constitute a complete circular cleaner.

2. An aparatus for removing scale from boiler-tubes, comprisingparallelbars each provided with a row of arcshaped portions 0 and (1provided with teeth 6; means for securing said bars together whereby thesaid arc-shaped portion will be placed opposite each other and eachportions 0 and d constitute a complete circular cleaner; clamps adaptedto be applied to the boiler-tubes; and

vers intermediate of the clamps and said bars whereby said bars andcleaners can be moved over the surface of the tubes, for the purpose setforth.

In testimony whereof I have signed my name to this specification in'thepresence of two subscribing witnesses. 15

DAVID ll. JENKINS. Witnesses:

JAMES TRENCHARD,

JOHN MASON SHARP.

